If all the world had were water balloons, the guy with the Super Soaker would reign supreme. That’s essentially the situation with the arrival of quantum computers. They’re so powerful that it takes them mere hours to solve problems that would take modern computers years to work through. That means that the moment the first quantum computer turns on, encrypted data across the internet is pretty much up for grabs. That is, unless we do something about it.

— Read on curiosity.com/topics/quantum-computers-pose-a-big-threat-to-internet-security-curiosity